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Misha Larkins [42]
3 years ago
15

The efficiency of a steam power plant can beincreased by bleeding off some of the steam thatwould normally enter the turbine and

usingit topreheat the water entering the boiler. In this process,liquid water at 50oC and 1000 kPa is mixed withsuperheated steam at 200oC and 1000 kPa. If the plantoperators want to produce a saturated liquid at 1000kPa, what ratio of mass flow rates of water andsuperheatedsteam are required
Engineering
1 answer:
3241004551 [841]3 years ago
5 0

Answer:

Explanation:

This is Answer....

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Plateau Creek carries 5.0 m^3 /s of water with a selenium (Se) concentration of 0.0015 mg/L. A farmer withdraws water at a certa
Bond [772]

Answer:

The correct answer is "4.8137 m³". The further explanation is given below.

Explanation:

Firstly we have to calculate the concentration of Se:

C = 0.0015 \ mg/L\times \frac{1g}{1000 mg}\times \frac{1 \ mol}{79 \ g}

   =1.9\times 10^{-8} \ mol/L

Concentration the fish can take:

=0.04 \ mg/L\times \frac{1 \ g}{1000mg}\times \frac{1 \ mol}{79 \ g}

According to the general dilution principle will be:

⇒  M_1V_1 = M_2V_2

The volume that can take the farmer will be:

V_2 = 1.9\times 10^{-8} M\times  \frac{5\times 10^3 \ L}{5.1\times 10-7 M}

    =186.27 \ L

On converting this into m³, we get

= 0.18627 \ m^3

Finally the volume the farmer can remove would be:

V = 5-0.18627

   = 4.8137 \ m^3

7 0
3 years ago
Madison how do you do this
Pani-rosa [81]

Answer:

Do what

Explanation:

Nothing is there

8 0
3 years ago
Read 2 more answers
Helium is used as the working fluid in a Brayton cycle with regeneration. The pressure ratio of the cycle is 8, the compressor i
Temka [501]

Answer:

Explanation:

Find the temperature at exit of compressor

T_2=300 \times 8^{\frac{1.667-1}{1.667} }\\=689.3k

Find the work done by the compressor

\frac{W}{m} =c_p(T_2-T_1)\\\\=5.19(689.3-300)\\=2020.4kJ/kg

Find the actual workdone by the compressor

\frac{W}{m} =n_c(\frac{W}{m} )\\\\=1 \times 2020.4kJ/kg

Find the temperature at exit of the turbine

T_4=\frac{1800}{8^{\frac{1.667-1}{1.667} }} \\\\=787.3k

Find the actual workdone by the turbine

1 \times 5.19 (1800-783.3)\\=5276.6kJ/kg

Find the temperature of the regeneration

\epsilon = \frac{T_5-T_2}{T_4-T_2} \\\\0.75=\frac{T_5-689.3}{783.3-689.3} \\\\T_5=759.8k

Find the heat supplied

Q_i_n=c_p(T_3-T_5)\\\\=5.19(1800-759.8)\\\\=5388.2kJ/kg

Find the thermal efficiency

n_t_h=\frac{W_t-W_c}{Q_i_n} \\\\=\frac{5276.6-2020.4}{5388.2} \\\\n_t_h=60.4

60.4%

Find the mass flow rate

m=\frac{W_net}{P} \\\\\frac{60 \times 10^3}{5276.6-2020.4} \\\\=18.42

Find the actual workdone by the compressor

\frac{W_c}{m} =\frac{(\frac{W}{m} )}{n_c} \\\\=\frac{2020.4}{0.8} \\\\=2525.5kg

Find the actual workdone by the turbine

\frac{W_t}{m} =n_t(\frac{W}{m} )\\\\=0.8 \times5.19(1800-783.3)\\\\=4221.2kJ/kg

Find the temperature of the compressor exit

\frac{W_t}{m} =c_p(T_2_a-T_1)\\2525.5=5.18(T_2_a-300)\\T_2_a=787.5k

Find the temperature at the turbine exit

4221.2=5.18(1800-T_4_a)\\\\T_4_a=985k

Find the temperature of regeneration

\epsilon =\frac{T_5-T_2}{T_4-T_2}\\\\0.75=\frac{T_5-787.5}{985-787.5}\\\\T_5=935.5k

6 0
3 years ago
Read 2 more answers
Realiza las siguientes conversiones.
amid [387]

Answer:

a) 4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.

b) 21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.

c) 0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.

d) 0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.  

e) 23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.

Explanation:

a) <em>4 hectómetros cuadrados a decámetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un hectómetro cuadrado equivale a 100 decámetros cuadradps. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 4\,Hm^{2}\times\frac{100\,Dm^{2}}{1\,Hm^{2}}

x = 400\,Dm^{2}

4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.

b) <em>21345 centímetros cuadrados a metros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 21345\,cm^{2}\times \frac{1\,m^{2}}{10000\,cm^{2}}

x = 2,135\,m^{2}

21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.

c) <em>0,592 kilómetros cuadrados a metros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 1000000 metros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 0,592\,km^{2}\times \frac{1000000\,m^{2}}{1\,km^{2}}

x = 592000\,m^{2}

0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.

d) <em>0,102 metros cuadrados a centímetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 0,102\,m^{2}\times \frac{10000\,cm^{2}}{1\,m^{2}}

x = 1020\,cm^{2}

0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.

e) <em>23911 kilómetros cuadrados a hectómetros cuadrados:</em>

Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 100 hectómetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:

x = 23911\,km^{2}\times \frac{100\,Hm^{2}}{1\,km^{2}}

x = 2391100\,Hm^{2}

23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.

7 0
4 years ago
What do u call a bad bird
statuscvo [17]

Answer:

A buzzerd

Explanation:

4 0
3 years ago
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